Saunier Duval Thematek Grundfos Circulating Pump Ref. S1005200
Grundfos circulator pump (Type UP 15-50 A0) installed in Saunier Duval Thematek and Themaclassic boilers. It moves the water in the heating circuit. The replacement requires first confirming the fault of the part through technical diagnosis, even when the water is not circulating, it makes noise, leaks at the seal, or the rotor is blocked. Power supply 230V~ 50Hz, IP44, up to 3 bar, with 85W of power.
- Type of part
- Pumps
- Status
- Refurbished
- Catalogue reference
- S1005200
- Warranty
- 1 year
Saunier Duval boilers compatible with reference S1005200
Circulating pump with reference S1005200. Five confirmed compatibilities: C 24 E and C AS 24 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 24 E | ThemaClassic | Contrasted |
| Saunier Duval C AS 24 E | ThemaClassic | Contrasted |
| Saunier Duval F 24 E | ThemaClassic | Contrasted |
| Saunier Duval F 25 E | ThemaClassic | Contrasted |
| Saunier Duval C 24 E | Themafast | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. S1005200 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference S1005200. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms that require diagnosis in the circulator pump S1005200
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler ignites and operates, but the radiators do not heat or heat very little.
Cause: The pump does not move the necessary flow of water through the heating circuit, even though the burner operates normally.
Check that the pump is spinning and is not blocked by touching its casing: if it vibrates but does not move water, bleed the circuit before replacing it.
- 02
There is a buzzing or strange noise in the pump area.
Cause: Air in the rotor, cavitation due to low pressure, or a worn bearing generate that characteristic noise.
Check the circuit pressure on the manometer and bleed the air from the system before declaring the pump faulty.
- 03
Water or moisture is dripping right under the pump.
Cause: The mechanical seal of the shaft has worn out and no longer seals the passage of water.
Locate whether the leak is coming from the pump body itself and not from a nearby joint or fitting before replacing it.
- 04
The pump makes a buzzing sound but the shaft does not rotate, or it does not start at all.
Cause: The rotor has seized up, something typical after being idle for months in summer, due to deposits or accumulated scale.
With the boiler turned off, try to free the shaft by turning the front screw with a flat screwdriver before assuming that it needs to be replaced.
- 05
The radiators are cold even though the boiler indicates that it is operating normally.
Cause: Without water circulation, the heat generated does not reach the heating circuit even though the burner ignites properly.
Check that the radiator and circuit shut-off valves are open before considering the pump.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F5 | Overheating of the primary circuit. | If the S1005200 circulating pump is blocked or not rotating, there is no flow in the primary circuit and the temperature rises very quickly, triggering the safety limiter/thermostat. Check by measuring 230 V at the pump terminals during demand, checking consumption/rotation and bleeding to rule out air or obstructions. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the Saunier Duval S1005200 circulation pump.
- Catalogue reference
- S1005200
- Uniclima internal SKU
- BCTSF24E
- Brand
- Saunier Duval
- Type of part
- Pumps
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- manufacturer
- Grundfos
- type
- UP 15-50 A0
- PN code
- 59994584
- Production code PC
- 0505HHD
- IWC code
- 4000120626
- voltage
- 230V~
- frequency
- 50Hz
- Power p1
- 85W
- Current im
- 0.38A
- capacitor
- 2µF
- Thermal protection
- TF95
- IP rating
- IP44
- Insulation class
- Class F
- Maximum pressure
- 3 bar
Frequently asked questions about the S1005200 circulation pump.
Does this Grundfos S1005200 pump work for a Saunier Duval Thematek C 24 E?
Who manufactures the pump for the ThemaClassic F 24 E range?
What fault indicates that this pump needs to be replaced in a Saunier Duval Thematek?
What pressure and power does the Grundfos S1005200 pump support?
Is the pump the same for the ThemaClassic C 24 E range and the Themafast C 24 E range?
Spare parts related to Saunier Duval ThemaClassic
